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3 years ago

PLEASE HELLPPPPPPP!!!!!!

Mathematics

2 answers:

pochemuha3 years ago

8 0

Company A would because it is the least with the lowest slope since it is not increasing very fast

Andru [333]3 years ago

3 0

The answer is Company A

This is because although the cost starts high, its raises very slowly. By 800 students both other companies cost way more than A. Using this information, it is safe to assume that company A will still remain the cheapest past 800 students.

I hope this helped. Have a great night.

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Does Y=3/X represent a linear function when X=0

Elis [28]

Hello,

Divide by 0 is impossible.
So when x=0; y is undefined.

<span>Therefore, y cannot be a linear function.</span>

8 0

3 years ago

Write the formula for the area of a triangle, A, where b is the base and h is the height of the triangle. Don’t include parenthe

Mkey [24]

Answer:

A = 1/2 × b × h

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

A triangle has one side that lies along the line y=1/4x and another that lies along the line y=-1/4x. Which of the following poi

mestny [16]

Answer:

We know that our triangle has one side along the line:

y = (1/4)*x

And other side along the line:

y = -(1/4)*x.

Now, we want to find the vertex.

And we know that the vertex is the point where the two sides conect, so the vertex must be a common point of both lines.

Then we have:

y = (1/4)*x = -(1/4)*x

x = -x

The only solution to that equation is x = 0.

now we evaluate our lines in x = 0 and get:

y = (1/4)*0 = 0

y = -(1/4)*0 = 0

Then the lines intersect in the point (0, 0)

Then the vertex must be in the point (0, 0)

4 0

3 years ago

Natalia picked 7 bushels of apples today and 4 bushels yesterday. How many more bushels did she pick today?

klasskru [66]

Answer:

Step-by-step explanation:

7-4

7 0

3 years ago

A survey of 35 individuals who passed the seven exams and obtained the rank of Fellow in the actuarial field finds the average s

arsen [322]

Answer:

$150000-2.032\frac{15000}{\sqrt{35}}=144847.94$

$150000+2.032\frac{15000}{\sqrt{35}}=155152.06$

So on this case the 95% confidence interval would be given by (144847.94;155152.06)

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

$\bar X=150000$ represent the sample mean

$\mu$ population mean (variable of interest)

s=15000 represent the sample standard deviation

n=35 represent the sample size

Solution to the problem

The confidence interval for the mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

In order to calculate the critical value $t_{\alpha/2}$ we need to find first the degrees of freedom, given by:

$df=n-1=35-1=34$

Since the Confidence is 0.95 or 95%, the value of $\alpha=0.05$ and $\alpha/2 =0.025$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.025,34)".And we see that $t_{\alpha/2}=2.032$

Now we have everything in order to replace into formula (1):

$150000-2.032\frac{15000}{\sqrt{35}}=144847.94$

$150000+2.032\frac{15000}{\sqrt{35}}=155152.06$

So on this case the 95% confidence interval would be given by (144847.94;155152.06)

3 0

4 years ago